Patience. If you taste it early and it's slimy or downright nasty, it's just not ready yet.
My barrel tastes like bile right now. The bacteria got out of hand. I'm stepping up multiple Brett cultures to get it back in check. It would eventually correct itself but I don't mind giving it a little help.
Walmart is about the only reason for open or concealed carry that I can get behind. -Randar
Yes it may get "sick" at some point and don't worry the Brett cleans it up with time. I let it sit for 8 months or so then let taste tell me when it's ready and depends if I'm blending it or adding fruit.